.loading {
  display: inline-block;
  justify-content: space-around;


  @keyframes loading {
    0% {
      background-color: rgba(0, 0, 0, .8);
    }

    100% {
      background-color: rgba(0, 0, 0, .1);
    }
  }

  span {
    display: inline-block;
    background-color: #111;
    border-radius: 50%;
    animation: loading .4s infinite alternate;

    &:nth-child(2) {
      animation-delay: .15s;
    }

    &:nth-child(3) {
      animation-delay: .3s;
    }
  }
}